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Ozone depletion refers to the phenomenon of reductions in the amount of ozone in the stratosphere. The problem of ozone depletion is caused by high levels of chlorine and bromine compounds in the stratosphere. The origins of these compounds are chlorofluorocarbons (CFC), used as cooling substances in air conditioners and refrigerators, or as aerosol propellants, and Bromo fluorocarbons (halons), used in fire extinguishers. As a result of depletion of the ozone layer, more ultraviolet (UV) radiation comes to Earth and causes damage to living organisms. UV radiation seems responsible for skin cancer in humans; it also lowers production of phytoplankton and thus affects other aquatic organisms. It can also influence the growth of terrestrial plants.
Times new Roman, Cambria, Arial are the examples of __________.
Who among the following is known as father of Internet?
Which of the following is an intersection of a row and column in a spreadsheet?
What does DRAM stand for?
In which of the following topology, each device is connected to every other device on a network through a dedicated point-to-point link?
What is the shortcut key for ‘Hiding Selected row’ in Excel?
GIF stands for___
Select all the text in MSWord document by:
What does the .org domain represents?
.......... are set of rules and procedures to control the data transmission over the internet